package com.one.apartmentsystem.common.interceptor;

import com.one.apartmentsystem.app.context.BaseContext;
import com.one.apartmentsystem.common.properties.JwtProperties;
import com.one.apartmentsystem.common.utils.IpAddressUtil;
import com.one.apartmentsystem.common.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * jwt令牌校验的拦截器
 */
@Component
@Slf4j
@EnableConfigurationProperties(JwtProperties.class)
public class JwtTokenUserInterceptor implements HandlerInterceptor {

    private final JwtProperties jwtProperties;


    public JwtTokenUserInterceptor(JwtProperties properties) {
        this.jwtProperties = properties;
    }

    /**
     * 校验jwt
     *
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        //1、从请求头中获取令牌
        String token = request.getHeader("Authorization");

        //2、校验令牌
        try {

//            StringBuilder ipAddr = IpAddressUtil.getIpAddr(request);
//            log.info("用户IP地址:{}", ipAddr);
            log.info("用户JWT校验:{}", token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getUserSecretKey(), token);
            log.info("用户JWT校验成功:{}", claims);
            Long userId =Integer.toUnsignedLong((Integer) claims.get("userId"));
            BaseContext.setCurrentId(userId);

            //3、通过，放行
            return true;
        } catch (Exception ex) {
            //4、不通过，响应401状态码
            log.info("token已过期！！");
            response.setStatus(401);
            return false;
        }
    }
}